11/01/05

11

ES51984

3 3/4 CAP AUTO DMM

The other combinations of FC1, FC2, FC3, and FC4 are for ADP modes. In ADP modes

, if FC5 is LOW, the minus sign on the LCD panel will not be displayed. And if KEY pin

is floating, the buzzer beeps when the input signal is overflow. The ADP mode function

is summarized below.

FC1

FC2

FC3

FC4

Mode

1

1

1

0

ADP0

1

1

0

0

ADP1

1

0

0

0

ADP2

1

0

1

0

ADP3

Note: Temperature measurement mode takes input signal from ADP pin. In temperature

measurement mode, VBAR pin is used to control the right most digit point on the

LCD panel. When VBAR is LOW, this digit point is displayed.

3. Push function

3.1 HOLD

HOLD mode makes the meter stop updating the LCD panel. This mode can be nested in

most of the special modes. Enabling HOLD function in automatic mode makes the

meter switch to manual mode, but the full scale range remains the same. HOLD function

can be cancelled by changing the measurement mode, pressing RANGE, or push HOLD

again.

3.2 Range

RANGE pin switches to and from automatic and manual mode, and while in manual

mode, changes the full scale range. The following figure shows the state transition.

Automatic

Mode

Manual

Mode

1 push < 1 sec

1 push > 1 sec

1 push < 1 sec

Range up

Measurement Mode

Auto

Manual

Control Range

Initial Range

V(DC/AC)

VR2 – VR5 VRi

→

VRi

+

1,

VR5 → VR1

400.0mV – 4000V

4.000V

µA(DC/AC)

R1 – R2

R1 → R2,

R2 → R1

400.0µA – 4000µA

400.0µA

mA

(AC/DC)

R1－R2

R1 → R2

R2 → R1

40.00mA - 400.0mA 40.00mA